text: /*
   * Copyright (c) 1988 University of Utah.
   * Copyright (c) 1990, 1993
   *	The Regents of the University of California.  All rights reserved.
   * (c) UNIX System Laboratories, Inc.
   * All or some portions of this file are derived from material licensed
   * to the University of California by American Telephone and Telegraph
   * Co. or Unix System Laboratories, Inc. and are reproduced herein with
   * the permission of UNIX System Laboratories, Inc.
   *
   * This code is derived from software contributed to Berkeley by
   * the Systems Programming Group of the University of Utah Computer
   * Science Department.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   * 3. All advertising materials mentioning features or use of this software
   *    must display the following acknowledgement:
   *	This product includes software developed by the University of
   *	California, Berkeley and its contributors.
   * 4. Neither the name of the University nor the names of its contributors
   *    may be used to endorse or promote products derived from this software
   *    without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   *
   *	@(#)ipc.h	8.4 (Berkeley) 2/19/95
   * $FreeBSD: src/sys/sys/ipc.h,v 1.15 1999/12/29 04:24:43 peter Exp $
   */
  
  /*
   * SVID compatible ipc.h file
   */
  #ifndef _SYS_IPC_H_
  #define _SYS_IPC_H_
  
  struct ipc_perm {
  	ushort	cuid;	/* creator user id */
  	ushort	cgid;	/* creator group id */
  	ushort	uid;	/* user id */
  	ushort	gid;	/* group id */
  	ushort	mode;	/* r/w permission */
  	ushort	seq;	/* sequence # (to generate unique msg/sem/shm id) */
  	key_t	key;	/* user specified msg/sem/shm key */
  };
  
  /* common mode bits */
  #define	IPC_R		000400	/* read permission */
  #define	IPC_W		000200	/* write/alter permission */
  #define	IPC_M		010000	/* permission to change control info */
  
  /* SVID required constants (same values as system 5) */
  #define	IPC_CREAT	001000	/* create entry if key does not exist */
  #define	IPC_EXCL	002000	/* fail if key exists */
  #define	IPC_NOWAIT	004000	/* error if request must wait */
  
  #define	IPC_PRIVATE	(key_t)0 /* private key */
  
  #define	IPC_RMID	0	/* remove identifier */
  #define	IPC_SET		1	/* set options */
  #define	IPC_STAT	2	/* get options */
  
  #ifdef _KERNEL
  /* Macros to convert between ipc ids and array indices or sequence ids */
  #define	IPCID_TO_IX(id)		((id) & 0xffff)
  #define	IPCID_TO_SEQ(id)	(((id) >> 16) & 0xffff)
  #define	IXSEQ_TO_IPCID(ix,perm)	(((perm.seq) << 16) | (ix & 0xffff))
  
  struct proc;
  
  int	ipcperm __P((struct proc *, struct ipc_perm *, int));
  #else /* ! _KERNEL */
  
  /* XXX doesn't really belong here, but has been historical practice in SysV. */
  
  #include <sys/cdefs.h>
  
  __BEGIN_DECLS
  key_t	ftok __P((const char *, int));
  __END_DECLS
  
  #endif /* _KERNEL */
  
  #endif /* !_SYS_IPC_H_ */
  